138063485721 has 32 divisors (see below), whose sum is σ = 222781010688. Its totient is φ = 74244925440.

The previous prime is 138063485719. The next prime is 138063485723. The reversal of 138063485721 is 127584360831.

It is an interprime number because it is at equal distance from previous prime (138063485719) and next prime (138063485723).

It is not a de Polignac number, because 138063485721 - 2¹ = 138063485719 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138063485723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5726031 + ... + 5750091.

It is an arithmetic number, because the mean of its divisors is an integer number (6961906584).

Almost surely, 2^138063485721 is an apocalyptic number.

It is an amenable number.

138063485721 is a deficient number, since it is larger than the sum of its proper divisors (84717524967).

138063485721 is a wasteful number, since it uses less digits than its factorization.

138063485721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40161.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 138063485721 in words is "one hundred thirty-eight billion, sixty-three million, four hundred eighty-five thousand, seven hundred twenty-one".